Whether an encapsulated pleural effusion requires puncture and drainage depends on the specific situation. If the amount of fluid is small, it usually does not need to be treated; if the amount of fluid increases significantly and presses on the patient with clinical symptoms, then puncture and drainage is required. Encapsulated pleural effusion refers to the occurrence of pleurisy, the adhesion between the dirty pleura and the wall pleura, which locally encapsulates the effusion in a certain part of the pleural cavity. If the amount of fluid is relatively small, the patient does not have obvious clinical symptoms, does not affect normal life, no special treatment is needed, until the fluid is slowly absorbed or gradually mechanized can be. If the amount of effusion increases significantly or forms encapsulated pyothorax, and the patient has symptoms such as chest tightness, fever, shortness of breath, etc., it is necessary to carry out puncture and drainage treatment in a timely manner, and it is also necessary to carry out symptomatic supportive treatments such as anti-infection or anti-tuberculosis treatment when encapsulated pyothorax occurs, and it is necessary to carry out thoracoscopic or open thoracotomy to peel off the pleural fibrous plate and eliminate the residual cavity if necessary. When the discovery of encapsulated pleural effusion, need to promptly seek medical treatment, under the guidance of the doctor for standardized treatment.